Boiler-flue connection.



D. B. EINES.

BOILER PLUE CONNEGTION.

APPLIGATION FILED sBPT.2s,19o.

Patnted May 4, 1909.

wbt/www0 e, maw* DANIEL B. 'HINEsI or NORFOLK, NEBRASKA.

BoILER-FLUE coNNEcTiN.

Specification of Letters Patent.

Patented May 4, 1909.

pplication ledSeptember 28, 1908. Serial No. 465,116.

To-all whom t may concern Be it known that l, DANIEL B. Hines, a citizen of the United States, residing at Norfolk7 in the county of Madison and State of Nebraska, have invented certain new and useful Improvements in Boiler-Flue Connections; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertainsto make and use the same.

This invention contemplates the formation of a flue joint 'for steam boilers that will be proof against expansion of the metals and permanently lock the flue to the boiler.

With this and other objects in view7 the invention consists of certain novel features of construction, combination and arrangement of parts, as will be more fully described and particularly pointed out in the appended Claims, and in the accompanying drawings, in which,

Figure 1 is a sectional view showing the manner in which my improved flue oint is formed.

Corresponding parts are indicated in the drawings and referred to in the following description by similar reference characters.

In the drawings, numeral 1 designates a boiler plate formed with an opening 2 which extends from the outer face of the boiler plate inwardly and lis concentrically enlarged at a point intermediate of the outer face and inner face of the boiler plate said enlargement forming a locking groove in the boiler late 1. 3 designates a llue which normaly is adapted to contact with the boiler plate formed with a reduced end 4 and a peripheral groove 5, said groove being arranged to occupy a position adjacent or opposite to the concentric enlargement of the opening 2 the reduced end which is approximately egual in length to one-half the thickness o the boiler late is held spaced apart from the boiler p ate to allow the entrance of the'welding or. brazing material by the operation of the flue contacting with the boiler plate. When `inserted in the boiler plate, the inner end of the flue 3 is adapted to project beyond the inner face of the boiler plate and when so inserted, the reduced end ofthe flue is brazed or welded to the boiler plate by placing a suitable brazing or welding metal in the space formed between the reduced end of the iiue and the boiler plate vso as to fill .the concentrically enlargedv portion of opening 2 and in` the peripheral groove of flue 3 and said s ace and applying intense heatv thereto suc 1 as may be produced by means of an oxygen-acetylene burner or electric arc. The locking groove of the boiler plate 1 is preferably formed V-shaped in cross section so that said groove will more securely hold welding or brazing material and the peripheral groove 5 is also formed V-shaped in cross section. The joint formed by my improved process will resist the pressure of steam and out-last the boiler on which it is formed. The brazing or weldinglmetal for connecting the iiue to the boiler plate extends on an incline upon the outer face of the plate to the end of the flue to form a flange for protecting the connection between the flue and. the boiler late.

From the foregoing description, .taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood without v requiring a more extended explanation.

Various changes in the formI proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention as deiined in the appended claims.

Having thus described and ascertained the nature of my invention, what I claim as new and desire to secure by Letters-Patent, is

1. A boiler flue connection comprising a boiler plate having an opening formed therein for the reception of a boiler flue end, said opening being concentrically enlarged to form a locking groove in the boiler plate, a boiler flue having its end reduced and formed with a peripheral groove adapted to register with the locking groove of the boiler late, and means for welding or brazing the oiler flue end to the boiler plate disposed in the grooves of said flue and plate and between the reduced end of the flue and the adjacent portion of the plate.

2. A boiler ilue connection comprising ca boiler plate formed with an opening for the reception of the boiler flue end, said opening being concentrically enlarged to form a locking groove in said late intermediate of the faces thereof, a boi er flue having a reduced end fitted tightly in the plate opening with the reduced end spaced apart from the plate so as y'to form a space for the entrance of welding or brazing material, said flue being formed with a peripheral groove adapted to register with the locking groove ofthe boiler plate, and means for Welding or brazing the flue end to the boiler plate disposed in the grooves of said Hue an plate and in the space between the reduced end of the flue and the adacent portion of the plate.

3. A boi er flue' connection com rising a boiler plate having an opening for t y e reception of the boiler iiue end, and a concentrlc groove formed therein and disposed intermediate of the faces of the plate, a boiler flue having an end reduced and formed with a peripheral groove adapted to register with the groove of the boiler plate, said plate groove and Y'said ue groove being formed` V-shaped in cross section, and means for Welding or brazin the flue lend tothe boiler plate disposed in t e rooves of said iue and pilate and between t e redncedend of the ue and adjacent portionof the plate, and overlapping the face of said plate so as to form a protecting flange for the-ilue and plate connection. a

In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses.

- DANIEL B. HINES. Witnesses:

g CHAS. S. EVANS,

GLEN W. CUMMINGs. 

